

氣閥鋼51Cr8Si2化學成份% Chemical Composition%
牌號Grade | 碳 C | 硅 Si | 錳 Mn | 硫 S | 磷 P | 鉻 Cr | 鎳 Ni | 銅 Cu |
51Cr8Si2 | 0.47~0.55 | 0.47~0.55 | 0.20~0.60 | ≤0.030 | ≤0.030 | 7.50~9.50 | ≤0.60 | ≤0.30 |
氣閥鋼51Cr8Si2機械性能% Mechanicai Properities%
牌號Grade | 抗拉強度 σb (MPa) | 條件屈服強度 σ0.2 (MPa) | 伸長率 δ5 (%) | 斷面收縮率 ψ (%) | 沖擊功 Akv (J) | 硬度 |
51Cr8Si2 | ≥880 | ≥680 | ≥10 | ≥35 | ≥50 | 退火≤200HB 淬火回火,≥260HB |